Airburst MegaBoom 1-liter bottles with BoomDust Pressurize bottles with Airburst MegaBoom Supersonic Target Systems (STS) 6pk: 2 bottles with apple graphic, 2 bottles with bullseye graphic and 2 bottles with prairie dog graphic Up to 150 decibels of boom when a bottle is punctured! • According to the manufacturer, lightweight pellets will penetrate the bottles and exhaust all the air but will not cause a supersonic boom (the bottle doesn't blow up). In .22 caliber, they told us that the lightest pellet that blows up the bottle and causes a boom weighs 14.3 grains. They have not provided a minimum-weight projectile for any other caliber. However, the manufacturer states that slingshot ammo will blow up the bottle (and cause a boom), which suggests that the weight of the projectile is more important than speed.
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